Xamarin.Form TouchEvent

Question

I need implement a function on a Xamarin.Form.Android Application.as follows:
After five minutes of no operation,Page jump to LoginPage.
So is there a global touch Event in Xamarin.form?I could change it to implements

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

is there a global touch Event in Xamarin.form?

No, But Android have a DispatchTouchEvent in the MainActivity.cs.

We can write a SessionManager like this thread: https://stackoverflow.com/a/51727021/10627299

Then, Use it in the MainActivity.cs. When have a click, the task will run, after 30 seconds, HandleSessionExpired will be execute.

   using System;  
     
   using Android.App;  
   using Android.Content.PM;  
   using Android.Runtime;  
   using Android.OS;  
   using Android.Views;  
     
   namespace DetectorNoAction.Droid  
   {  
       [Activity(Label = "DetectorNoAction", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize )]  
       public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity  
       {  
           protected override void OnCreate(Bundle savedInstanceState)  
           {  
               base.OnCreate(savedInstanceState);  
     
               Xamarin.Essentials.Platform.Init(this, savedInstanceState);  
               global::Xamarin.Forms.Forms.Init(this, savedInstanceState);  
     
              
     
               LoadApplication(new App());  
           }  
     
           public override void OnUserInteraction()  
           {  
               base.OnUserInteraction();  
     
               
           }  
     
            void HandleSessionExpired(object sender, EventArgs e)  
           {  
                App.Instance.DoLogoutAsync();  
           }  
     
           public  override bool DispatchTouchEvent(MotionEvent ev)  
           {  
     
               switch (ev.Action)  
               {  
                     
                   case MotionEventActions.Up:  
                       SessionManager.Instance.SessionDuration = TimeSpan.FromSeconds(30);  
     
                        
                       SessionManager.Instance.OnSessionExpired = HandleSessionExpired;  
                         
                       SessionManager.Instance.StartTrackSessionAsync();  
                       break;  
                   default:  
                       SessionManager.Instance.EndTrackSession();  
                       break;  
               }  
               return base.DispatchTouchEvent(ev);  
     
           }  
           public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)  
           {  
               Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);  
     
               base.OnRequestPermissionsResult(requestCode, permissions, grantResults);  
           }  
       }  
   }  

After execute App.Instance.DoLogoutAsync();, it will open login page in the App.xaml.cs

  public partial class App : Application  
  {  
    public static App Instance { get; set; }  

    public App()  
    {  
        InitializeComponent();  
        Instance = this;  

        MainPage = new MainPage();  
    }  


    public void DoLogoutAsync()  
    {  
        Console.WriteLine("========================");  
        MainPage = new LoginPage();  
    }  

Best Regards,

Leon Lu

---

If the response is helpful, please click "Accept Answer" and upvote it.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.